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Opening and polling test Flashcards | StudBud
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Opening and polling test
Opening and polling test
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Answers
1
Atoms of different chemical elements have the same atomic mass
True
False
2
The representation below is widely used in chemistry and we call it ...
Thermochemical equation
Phases diagram
Chemical Equation
Chemical Reactions
3
Based on the molecular formula of sulfuric acid, we can say that the molecular composition of this compound is formed by
2 Different chemical elements
Predominantly by sulfur atoms
3 Different chemical elements
Same amounts of the same chemical element
4
Which of the materials below is non-combustible?
Wood
Paper
Gess
Cork
5
Wood over time undergoes attack by fungi and mold and undergoes degradation which is a chemical transformation
False
True
6
Synthetic or artificial polymers are produced in the laboratory, in general, from products derived from ...
Latex
Cellulose
Petroleum
Bauxite
7
The flammability of petroleum products is a chemical property
False
True
8
How do we call the basic unit of matter?
molecule
chemical element
atom
electron
9
A joint of atoms that have the same number of protons in their atomic nucleus, what means, the same atomic number
chemical element
polymer
substance
mixture
10
Malleability is a physical property of metals and the act of molding aluminum parts is a physical transformation
True
False
11
The compressive strength of concrete is a chemical property
False
True
12
Corrosion of iron parts is a physical transformation
True
False
13
According to the chemical equation for rust formation we can say that
waterproofing the surface can prevent such a transformation
avoid contact of the iron with heat can prevent the rust
it is not a spontaneous process
the only cause of the phenomenon is water
14
Oxidation is a phenomenon caused exclusively by substances that contain oxygen
False
True
15
Current atomic model is based on the postulates of ...
Thomson
Bohr
Dalton
Rutherford
16
Particle present in the atom of negative electric charge
neutron
proton
electron
DNA
17
Changes in physical state only occur by changing the temperature
False
True
18
Some materials are not able to exist in different physical states, some when heated, go through a process called...
evaporation
oxidation
heating
decomposition